From: Harry Williams <firstname.lastname@example.org> To: <MI400@midrange.com> Sent: Wednesday, November 21, 2001 3:06 AM Subject: [MI400] Algorithm for the DUKPT? > Does anyone know where to find the Algorithm for the encryption DUKPT? > First a definition: Derived unique key per transaction (DUKPT) is a key generation method where a large number of distributed terminals communicate with a few centralized entities (acquirers). In DUKPT each terminal is equipped with a base key which is a shared secret known only by the terminal and the acquirer. The unique transaction keys are derived from the base key and non secret transaction information. The DUKPT is an ANSI standard (X9.24). You can order the document at http://webstore.ansi.org/ansidocstore/product.asp?sku=ANSI+X9%2E24%2D1998 It costs $120.00. I don't know if a 'pirate' or 'warez' version is available. DUKPT uses DES (a triple-DES version seems to be around as well).
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